Mainz 2017 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 58: Quantum Gases: Fermions III
Q 58.3: Vortrag
Freitag, 10. März 2017, 15:00–15:15, P 204
Transport of ultracold fermions through a mesoscopic one-dimensional lattice — •Martin Lebrat1, Dominik Husmann1, Samuel Häusler1, Laura Corman1, Sebastian Krinner1, Pjotrs Grišins2, Thierry Giamarchi2, Jean-Philippe Brantut1, and Tilman Esslinger1 — 1Institute for Quantum Electronics, ETH Zurich, 8093 Zürich, Switzerland — 2Department of Quantum Matter Physics, University of Geneva, 1211 Genève, Switzerland
Conductance is one of the simplest measurable quantities revealing the conducting or insulating nature of a physical system, and yet an intricate non-local property sensitive to quantum interferences at a microscopic level. In our cold-atom setup, such a conductance measurement can be performed by connecting two macroscopic reservoirs of ultracold fermions to a smaller structure engineered by light potentials, and probing the current created by a atom number difference between the reservoirs.
In this talk, we report on the transport of degenerate 6Li atoms through a structure tailored in a bottom-up approach: using a Digital Micromirror Device to project up to nine consecutive scatterers inside a one-dimensional constriction, a lattice can be formed one site at a time. We observe the emergence of a band gap, originating from interferences among the scatterers. The coherent character of transport can be investigated by independently changing the lattice length and the temperature. The presence of a gap is robust against attractive interparticle interactions, hinting at the persisting fermionic character of the strongly correlated gas present in the 1d lattice.